I just got my first Ball Python "Brutis". He is still young about 1 1/2 ft. I have him in a 10gal tank. I have a small under tank heater directly under his hide and water on the other side of the tank. I put a heavy towel over most of the screen on the top but I am not getting his tank to the desired temp (about 72 on the cold side). He comes out of his hide but not for long then goes back in.

Would it be ok to get another under tank heater to leave on during the day? If yes should I put it under the water on the other side of the tank?
Or would you recommend a heat light?

Thank you in advance for your help. I want to make sure I provide the best home possible for him.

Regards,
Cory